20893963 has 2 divisors, whose sum is σ = 20893964. Its totient is φ = 20893962.

The previous prime is 20893933. The next prime is 20893967. The reversal of 20893963 is 36939802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20893963 - 2⁵ = 20893931 is a prime.

It is not a weakly prime, because it can be changed into another prime (20893967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446981 + 10446982.

It is an arithmetic number, because the mean of its divisors is an integer number (10446982).

Almost surely, 2^20893963 is an apocalyptic number.

20893963 is a deficient number, since it is larger than the sum of its proper divisors (1).

20893963 is an equidigital number, since it uses as much as digits as its factorization.

20893963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 20893963 is about 4570.9914679422. The cubic root of 20893963 is about 275.4272718852.

The spelling of 20893963 in words is "twenty million, eight hundred ninety-three thousand, nine hundred sixty-three".